Imagine a dangerous road curve. Do you blame the drivers and call it a day? After all, not everyone crashes over the edge or into oncoming traffic.

Or do you bank the turn, calculate a safe speed limit and add a railing?

It won’t stop all crashes, but it’ll reduce them.

Re-engineering the road doesn’t ignore the driver’s decisions, but it acknowledges that they don’t happen in isolation. Change the circumstances, and you change how many drivers crash and burn.